Infinity Ward's community manager muses, "they wonder why people don't make PC games any more."

"We pulled some disturbing numbers this past week about the amount of PC players currently playing Call of Duty 4 Multiplayer (which was fantastic)," writes Robert Bowling, on the game's community blog. "What wasn't fantastic was the percentage of those numbers who were playing on stolen copies of the game."

"The amount of people who pirate PC games is astounding," he added. "It blows me away that people are willing to steal games (or anything) simply because it's not physical or it's on the safety of the internet to do."

PC games sales have decreased in recent years due to rampant piracy of software and other digital goods over internet sharing sites.